• Updated 31 Oct, 14:35 UTC
  • Next run 1 Nov, 05:17 UTCNext 1 Nov 05:17
  • Last 7 days: 4 new models · 448 runs7 d: 4 models · 448 runs
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Claude Sonnet 5.5 vs Claude Fable 5.1

6 prompts both ran·Specs and numbers·Change models

Claude Sonnet 5.5 took 3 min 49 s and $0.34 at list price, Claude Fable 5.1 took 16 min 4 s and $3.97 at list price. Claude Fable 5.1 took 4.2× as long and cost 12× as much.

Claude Sonnet 5.5

Anthropic · $10.00/M out · 9 HN pts

Claude Fable 5.1

Anthropic · $50.00/M out · 1,630 HN pts

Pelican

Generate an SVG of a pelican riding a bicycle

Claude Sonnet 5.5's SVG for the "Pelican riding a bicycle" prompt

Claude Sonnet 5.5

12 s$0.0131.3k tokensCLI
Claude Fable 5.1's SVG for the "Pelican riding a bicycle" prompt

Claude Fable 5.1

26 s$0.0971.9k tokensCLI

Watch

Draw a mechanical wristwatch that shows the current local time, with a sweeping seconds hand and a date window. Make it look expensive.

Still of Claude Sonnet 5.5's page for the "Wristwatch that shows the current time" prompt

Claude Sonnet 5.5

42 s$0.0656.5k tokensCLI
Still of Claude Fable 5.1's page for the "Wristwatch that shows the current time" prompt

Claude Fable 5.1

2 min 16 s$0.6012k tokensCLI

Landing

Build the landing page for Lumen Cycles, a Copenhagen workshop that builds custom cargo bikes to order. Make it look like a real brand you would trust with 4,000 euros.

Still of Claude Sonnet 5.5's page for the "Landing page for a cargo bike workshop" prompt

Claude Sonnet 5.5

1 min 37 s$0.1616k tokensCLI
Still of Claude Fable 5.1's page for the "Landing page for a cargo bike workshop" prompt

Claude Fable 5.1

5 min 44 s$1.4729k tokensCLI

Breakout

Make a Breakout game I can play right now with the keyboard or the mouse. Give it several levels, a score and some juice.

Still of Claude Sonnet 5.5's page for the "Playable Breakout" prompt

Claude Sonnet 5.5

53 s$0.0838.3k tokensCLI
Still of Claude Fable 5.1's page for the "Playable Breakout" prompt

Claude Fable 5.1

5 min 38 s$1.4228k tokensCLI

Design a logo for Night Heron, an independent bookshop that only opens after dark.

Claude Sonnet 5.5's SVG for the "Bookshop logo" prompt

Claude Sonnet 5.5

17 s$0.0202.0k tokensCLI
Claude Fable 5.1's SVG for the "Bookshop logo" prompt

Claude Fable 5.1

1 min 43 s$0.357.0k tokensCLI

About

Write the opening of the About us page for Patchbay, a three-person studio in Rotterdam that repairs vintage synthesizers. About 150 words.

Patchbay is three people in a workshop in Rotterdam, trying to keep old synthesizers alive. We repair, restore and recalibrate the instruments that shaped electronic music: Moogs and Oberheims, Rolands and Sequential Circuits, the odd temperamental Soviet oddity that someone found in an attic.

Most of what lands on our benches has been silent for years. A crackling pot, a drifting oscillator, a power supply that gave up in 1994. Some come from working musicians who need their instrument back before the next tour. Others come from people who inherited a dusty box from a parent and want to hear what it sounds like.

We work slowly and by hand. We trace faults with a scope and a schematic, source or rebuild parts when originals are gone, and change as little as we can. Every synth leaves with a note describing exactly what we did, so the next person to open it knows where we have been.

Come by, bring your synth, and stay for coffee.

Claude Sonnet 5.5

7 s$0.005475 tokensCLI

Patchbay is three people and one workshop in Rotterdam, and we spend our days bringing old synthesizers back to life. Most of what arrives at our bench is somewhere between thirty and fifty years old: a Juno with a dead voice chip, a Minimoog that drifts out of tune the moment the room warms up, a Polysix whose battery has quietly eaten its own circuit board. We know these instruments inside and out because we have had hundreds of them open on the table.

We started Patchbay because we kept meeting musicians who had been told their synth was not worth fixing. We disagree. These machines were built to be serviced, and with the right parts, enough patience, and a good set of schematics, almost any of them can be made to play again. When we hand an instrument back, we want it to sound the way it did the day it left the factory, or better.

Claude Fable 5.1

17 s$0.025494 tokensCLI

Specs and numbers

Claude Sonnet 5.5Claude Fable 5.1
MakerAnthropicAnthropic
Made inUSUS
Released28 Sep 20261 Sep 2026
Price in, per M tokens$2.00$10.00
Price out, per M tokens$10.00$50.00
Context1,000,000 tokens1,000,000 tokens
Weightsclosedclosed
Hacker News points91,630
Time for the six prompts3 min 49 s16 min 4 s
List price of the six prompts$0.34$3.97

Claude Sonnet 5.5 was cheaper: $3.63 less at list price, and less on each of the 6 prompts. Claude Sonnet 5.5 was faster: 12 min 16 s less in total, and faster on each of the 6 prompts.

In the recording, Claude Sonnet 5.5's Breakout game plays; Claude Fable 5.1's stopped painting.

Rebuild this screen experiment: Claude Sonnet 5.5's rebuild matched the screenshot at 94%, Claude Fable 5.1's 78%. Tea Garden experiment: Claude Sonnet 5.5's game passed 5 of 5 checks, Claude Fable 5.1's 5 of 5.

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